alloy_consensus/
constants.rs

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//! Ethereum protocol-related constants
use alloy_primitives::{b256, B256};

/// The first four bytes of the call data for a function call specifies the function to be called.
pub const SELECTOR_LEN: usize = 4;

/// Maximum extra data size in a block after genesis
pub const MAXIMUM_EXTRA_DATA_SIZE: usize = 32;

/// Multiplier for converting gwei to wei.
pub const GWEI_TO_WEI: u64 = 1_000_000_000;

/// Multiplier for converting finney (milliether) to wei.
pub const FINNEY_TO_WEI: u128 = (GWEI_TO_WEI as u128) * 1_000_000;

/// Multiplier for converting ether to wei.
pub const ETH_TO_WEI: u128 = FINNEY_TO_WEI * 1000;

/// Multiplier for converting mgas to gas.
pub const MGAS_TO_GAS: u64 = 1_000_000u64;

/// The Ethereum mainnet genesis hash.
pub const MAINNET_GENESIS_HASH: B256 =
    b256!("d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3");

/// Goerli genesis hash.
pub const GOERLI_GENESIS_HASH: B256 =
    b256!("bf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a");

/// Sepolia genesis hash.
pub const SEPOLIA_GENESIS_HASH: B256 =
    b256!("25a5cc106eea7138acab33231d7160d69cb777ee0c2c553fcddf5138993e6dd9");

/// Holesky genesis hash.
pub const HOLESKY_GENESIS_HASH: B256 =
    b256!("b5f7f912443c940f21fd611f12828d75b534364ed9e95ca4e307729a4661bde4");

/// Testnet genesis hash.
pub const DEV_GENESIS_HASH: B256 =
    b256!("2f980576711e3617a5e4d83dd539548ec0f7792007d505a3d2e9674833af2d7c");

/// Optimism goerli genesis hash.
pub const GOERLI_OP_GENESIS: B256 =
    b256!("c1fc15cd51159b1f1e5cbc4b82e85c1447ddfa33c52cf1d98d14fba0d6354be1");

/// Base goerli genesis hash.
pub const GOERLI_BASE_GENESIS: B256 =
    b256!("a3ab140f15ea7f7443a4702da64c10314eb04d488e72974e02e2d728096b4f76");

/// Keccak256 over empty array.
pub const KECCAK_EMPTY: B256 =
    b256!("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");

/// Ommer root of empty list.
pub const EMPTY_OMMER_ROOT_HASH: B256 =
    b256!("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347");

/// Root hash of an empty trie.
pub const EMPTY_ROOT_HASH: B256 =
    b256!("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421");

/// Transactions root of empty receipts set.
pub const EMPTY_RECEIPTS: B256 = EMPTY_ROOT_HASH;

/// Transactions root of empty transactions set.
pub const EMPTY_TRANSACTIONS: B256 = EMPTY_ROOT_HASH;

/// Withdrawals root of empty withdrawals set.
pub const EMPTY_WITHDRAWALS: B256 = EMPTY_ROOT_HASH;

/// Identifier for legacy transaction, however a legacy tx is technically not
/// typed.
pub const LEGACY_TX_TYPE_ID: u8 = 0;

/// Identifier for an EIP2930 transaction.
pub const EIP2930_TX_TYPE_ID: u8 = 1;

/// Identifier for an EIP1559 transaction.
pub const EIP1559_TX_TYPE_ID: u8 = 2;

/// Identifier for an EIP4844 transaction.
pub const EIP4844_TX_TYPE_ID: u8 = 3;

/// Identifier for an EIP7702 transaction.
pub const EIP7702_TX_TYPE_ID: u8 = 4;